The elder Lively is best known for her role in that 1989 teen movie, where Robyn eventually lands the "it" guy in high school. The movie ends with a dramatic dance between Lively and her co-star, where she throws her magical necklace to a family member, essentially giving her magic away.

"So for [Blake's] wedding, my younger brother and I got together and figured out how to do that last scene, the 'Finest Hour' dance," she said. "We surprised her at the wedding." Related: Ryan Reynolds Could Have Been a Cop The wedding between the "Turbo" star, 36, and Lively's "Gossip Girl" younger sister took place Sept. 9, 2012 at Boone Hill Plantation in South Carolina. Robyn Lively made sure not to disappoint the famous duo by even wearing the same outfit she had on in the movie more than 20 years ago. "I got a blue dress, a blue tutu and the music comes on," she said. "I had the necklace remade. I took it off and threw it to her. We did the whole dance!" Lively may have sparked a resurgence to her acting career by performing the iconic dance. "Everyone else that was there was coming up to me talking about 'Teen Witch' being their favorite," she added.